Have noticed a pattern. The rioters form lines and the Police form lines. The rioters advance and the Police ask the rioter to disperse. The rioters force confrontation and the Police respond. Once the Police respond the looting begins but not till the Police respond. Is as though the rioter want the Police to respond in order that the looting may begin. With perhaps the National Guard there to confront the rioters the Police will be able to respond to the looters?
The tactic is being employed by the communists that have come to Ferguson. We have seen it many times over the last century and a half.